diff --git a/11/nginx.conf b/11/nginx.conf
index 7e7bdae..52dc444 100644
--- a/11/nginx.conf
+++ b/11/nginx.conf
@@ -25,23 +25,26 @@ http {
         publickey  = Nginx::Var.new.publickey
         privatekey = Nginx::Var.new.privatekey
 
-        if arg_publickey && arg_publickey.match(publickey) || !arg_expires
-          Nginx.return Nginx::HTTP_FORBIDDEN
-        end
-
-        plaintext = "#{Nginx::Var.new.request_method}#{Nginx::Var.new.uri}#{arg_expires}#{publickey}"
-        hmac_sha1 = Digest::HMAC.digest(plaintext, privatekey, Digest::SHA1)
-        signature = Base64::encode(hmac_sha1)
-
-        if expires < Time.now.to_i
-          Nginx.return Nginx::HTTP_FORBIDDEN
-        end
-
-        if signature == arg_signature
-          Nginx.echo "Sucess"
-        else
-          Nginx.return Nginx::HTTP_FORBIDDEN
-        end
+        Nginx.return -> do
+          if arg_publickey && arg_publickey.match(publickey) || !arg_expires
+            return Nginx::HTTP_FORBIDDEN
+          end
+
+          plaintext = "#{Nginx::Var.new.request_method}#{Nginx::Var.new.uri}#{arg_expires}#{publickey}"
+          hmac_sha1 = Digest::HMAC.digest(plaintext, privatekey, Digest::SHA1)
+          signature = Base64::encode(hmac_sha1)
+
+          if expires < Time.now.to_i
+            return Nginx::HTTP_FORBIDDEN
+          end
+
+          if signature == arg_signature
+            Nginx.echo "Sucess"
+            return Nginx::HTTP_OK
+          else
+            return Nginx::HTTP_FORBIDDEN
+          end
+        end.call
       ';
     }
   }